linux-stable/Documentation/devicetree
Jon Hunter d7b59cd020 arm64: tegra: Fix Tegra194 PCIe compatible string
[ Upstream commit f9f711efd4 ]

If the kernel configuration option CONFIG_PCIE_DW_PLAT_HOST is enabled
then this can cause the kernel to incorrectly probe the generic
designware PCIe platform driver instead of the Tegra194 designware PCIe
driver. This causes a boot failure on Tegra194 because the necessary
configuration to access the hardware is not performed.

The order in which the compatible strings are populated in Device-Tree
is not relevant in this case, because the kernel will attempt to probe
the device as soon as a driver is loaded and if the generic designware
PCIe driver is loaded first, then this driver will be probed first.
Therefore, to fix this problem, remove the "snps,dw-pcie" string from
the compatible string as we never want this driver to be probe on
Tegra194.

Fixes: 2602c32f15 ("arm64: tegra: Add P2U and PCIe controller nodes to Tegra194 DT")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-23 10:36:30 +02:00
..
bindings arm64: tegra: Fix Tegra194 PCIe compatible string 2020-04-23 10:36:30 +02:00
booting-without-of.txt docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
changesets.txt
dynamic-resolution-notes.txt
of_unittest.txt
overlay-notes.txt
usage-model.txt
writing-schema.rst dt-bindings: Improve validation build error handling 2020-01-04 19:18:11 +01:00